There are a number of free video editing options online that you might like to consider if you don't have access to either iMovie or MovieMaker.

One option is to use YouTube Editor though you will need to sign up for a YouTube account to use it.
Here's a movie which shows how to get started with the YouTube Editor.


Another online option is WeVideo for Google Drive, (again you will need to sign up for a Google Drive Account to use this option). Check out this movie to see how.


A non-Google option is to use Magisto which automates the video creation process. Magisto also has a range of apps.


Another option is to use Stupeflix which automates the video creation process. Stupeflix also has an iPad app called Replay as well as a Google Chrome Extension. Check out the Stupeflix YouTube Tutorials.